Polypropylene sheets are extruded, cooled, and cut into master sheets. Bi-axially oriented polypropylene (BOPP) is polypropylene that is stretched in two directions. This process is only done with thinner films, not the thicker sheets that we stock. This type of film tends to be used in packaging and labeling. We do not stock BOPP, but can provide it on … Read more What is the difference between Polypropylene sheets and BOPP film?